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Watananonta, WTangsakul, SKatong, SPhetprapi, PJantawat, SSamuthong, NHoweler, Reinhardt H.[Effect of methods of land preparation on the yields of four cassava cultivars in Thailand]Effect of methods of land preparation on the yields of four cassava cultivars in Thailand

Information on some diseases and pests that attack cassava, as well as the symptoms induced by nutritional deficiencies and toxicities and damage resulting from the misuse of herbicides are given in this manual. Specific and general recommendations regarding the control of the described problems ...

En este manual se presenta informacion sobre algunas de las enfermedades y plagas que atacan a la yuca, como tambien los sintomas inducidos por deficiencias y toxicidades nutricionales y danos debidos al uso incorrecto de los herbicidas. Se incluyen recomendaciones generales y especificas para el...


Lozano, J.C.Bellotti, Anthony C.Reyes, J.A.Howeler, Reinhardt H.Leihner, D.E.Doll, J.[Problemas en el cultivo de la yuca]Problemas en el cultivo de la yuca

Cadavid López, Luis FernandoHoweler, Reinhardt H.[El problema de la erosion en los suelos de Mondomo, Cauca, Colombia dedicados al cultivo de la yuca y sus posibles soluciones]El problema de la erosion en los suelos de Mondomo, Cauca, Colombia dedicados al cultivo de la yuca y sus posibles soluciones

The results are given of physicochemical analyses of soils and estimated cassava yields for five production zones in Colombia. There was little correlation between yield and the factors studied. Yields tended to increase as P increased; and there was a positive response to K in 2 zones and Ca/Mg ...


Díaz Duque, R.O.Howeler, Reinhardt H.Varon R, U[Evaluacion de los analisis de suelos de las zonas productoras de yuca en Colombia]Evaluacion de los analisis de suelos de las zonas productoras de yuca en Colombia

Howeler, Reinhardt H.Ballesteros, D[El cultivo de la yuca en los llanos orientales de Colombia : variedades y prácticas agronómicas]El cultivo de la yuca en los llanos orientales de Colombia : variedades y prácticas agronómicas

Cassava is among the food crops that tolerate soil acidity well; therefore, it is often planted on highly acid, unfertile soils without fertilization or liming. Nevertheless, cassava needs large quantities of P for maximum productivity. In fertilization trials at Carimagua (Llanos Orientales, Col...


Howeler, Reinhardt H.[Respuesta de la yuca a la aplicacion de fosforo]Respuesta de la yuca a la aplicacion de fosforo

In May 1980 the soil section of CIAT's cassava program established a fertilization trial with 3 cassava var. [Barranquena (regional), M Col 113, and CMC 921 to measure its effect on yield and establish optimum levels from an economical point of view. The trial took place in Mondomito and Agua Bla...

En mayo de 1980 en la seccion de suelos del programa de yuca del CIAT se establecio un ensayo de fertilizacion con 3 var. de yuca (Barranquena (regional), M Col 113 y CMC 92) para medir su efecto en el rendimiento y establecer los niveles optimos desde el punto de vista economico. El ensayo se lo...


Díaz, R.O.Howeler, Reinhardt H.Cadavid, L.F.[Anilisis economico de un ensayo de fertilizacion en yuca]Anilisis economico de un ensayo de fertilizacion en yuca

Specific recommendations for cassava cultivation and soil conservation in the plateau area of the Colombian Llanos Orientales are given. These include choice of area (level), soil preparation, var. (M Ven 77, M Per 245, and HMC 2, and the hybrids CM 507-37, CM 523-7, and CM 430-37), selection of ...


Howeler, Reinhardt H.Calle, FSalazar, E[El cultivo de yuca para la altillanura plana de los Llanos Orientales de Colombia]El cultivo de yuca para la altillanura plana de los Llanos Orientales de Colombia

Field inoculation trials with cassava (Manihot esculenta Crantz) were conducted in Quilichao (typic Dystropept soil) and Carimagua (Haplustox soil). In Quilichao, with a large and effective native VA-mycorrhizal (VAM) population, inoculation withGlomus manihotis did not increase cassava yields si...


Howeler, Reinhardt H.Sieverding, E[Potentials and limitations of mycorrhizal inoculation illustrated by experiments with field-grown cassava]Potentials and limitations of mycorrhizal inoculation illustrated by experiments with field-grown cassava

A three different sites with acid soils in Colombia field trials with cassava were monitored for frequency of VA mycorrhiza. Increasing levels of phosphorus (P) from 0 to 200 kg P/ha had been applied. The fields differed in the composition of species of VA mycorrhizal fungi. At all sites infectio...


Sieverding, EHoweler, Reinhardt H.[Influence of species of VA mycorrhizal fungi on cassava yield Response to phosphorus fertilization]Influence of species of VA mycorrhizal fungi on cassava yield Response to phosphorus fertilization

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